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1. 发明授权

US4910390A Method of covering an electrical connection or cable with a fluoroelastomer mixture 失效
标题翻译：用含氟弹性体混合物覆盖电连接或电缆的方法
公开(公告)号：US4910390A
公开(公告)日：1990-03-20
申请号：US148200
申请日：1988-02-01
申请人： Len Barrett , Neville Batliwalla , James Rinde , Norman A. Gac
发明人： Len Barrett , Neville Batliwalla , James Rinde , Norman A. Gac
IPC分类号： H01B3/44 , H01R4/70 , H05B3/14
CPC分类号： H05B3/146 , H01B3/445 , H01R4/70 , Y10S174/08
摘要： Curable compositions which are useful for encapsulating electrical connections and for joining metals to metals, and which comprise a mixture of high and low molecular weight fluorocarbon elastomers. Preferred compositions comprise a mixture of three fluorocarbon elastomers, the first having a Mooney viscosity at 121.degree. C. of at least 120, the second a Mooney viscosity at 121.degree. C. of 80 to 110, and the third a Brookfield viscosity at 100.degree. C. of 1,000 to 4,000 centipoises, in amounts 5 to 50%, 25 to 70% and 5 to 50% respectively, based on the weight of the polymeric component. The compositions can be easily molded under heat and pressure, and after they have been cured, they have remarkable resistance to degradation by hot liquids, even under pressure. Consequently, the compositions are very useful in the manufacture of self-regulating heaters for use in heating the production tubes of oil wells.
摘要翻译：可用于封装电连接和用于将金属接合到金属上的组合物，其包含高分子量和低分子量氟碳弹性体的混合物。优选的组合物包含三种氟碳弹性体的混合物，第一种在121℃的门尼粘度为至少120，第二种在121℃下的门尼粘度为80至110，第三种在100℃时为Brookfield粘度分别为1000至4,000厘泊，分别为5至50％，25至70％和5至50％，基于聚合物组分的重量。组合物可以在热和压力下容易地模塑，并且在固化之后，即使在压力下它们也具有显着的抗热液体降解性。因此，组合物在制造用于加热油井生产管的自调节加热器中非常有用。

2. 发明授权

US4722758A Method of covering an electrical connection or cable with a fluoroelastomer mixture 失效
公开(公告)号：US4722758A
公开(公告)日：1988-02-02
申请号：US772287
申请日：1985-09-04
申请人： Len Barrett , Neville Batliwalla , James Rinde , Norman A. Gac
发明人： Len Barrett , Neville Batliwalla , James Rinde , Norman A. Gac
IPC分类号： H01B3/44 , H01R4/70 , H05B3/14 , H01B13/08
CPC分类号： H05B3/146 , H01B3/445 , H01R4/70 , Y10S174/08
摘要： Curable compositions which are useful for encapsulating electrical connections and for joining metals to metals, and which comprise a mixture of high and low molecular weight fluorocarbon elastomers. Preferred compositions comprise a mixture of three fluorocarbon elastomers, the first having a Mooney viscosity at 121.degree. C. of at least 120, the second a Mooney viscosity at 121.degree. C. of 80 to 110, and the third a Brookfield viscosity at 100.degree. C. of 1,000 to 4,000 centipoises, in amounts 5 to 50%, 25 to 70% and 5 to 50% respectively, based on the weight of the polymeric component. The compositions can be easily molded under heat and pressure, and after they have been cured, they have remarkable resistance to degradation by hot liquids, even under pressure. Consequently, the compositions are very useful in the manufacture of self-regulating heaters for use in heating the production tubes of oil wells.

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